Next question: How to hitch it to the motorhome? What hitches do you folks use?
Also, I hadn't planned on brakes. I see above mixed opinions - some suggest the tow vehicles brakes are sufficient while others suggest trailer brakes - are there any guidelines?
Last question first - you might not *need* brakes, but you very likely *must have* brakes. It's a law in most states and canada that trailers (and a car counts as a trailer for this) over a certain weight must have a working tow brake system. In many cases the "certain weight" is 3000 lb or so, but may be as low as 1500 lb. I would definitely check state laws. Also the fact that it meets *your* state law dosn't mean you won't get hassled for it elsewhere. (I have heard stories of people caught towing sans brakes, being forced to unhitch on the spot and drive the car separately.)
See: Roadmaster Inc. - Tow Bars, Braking Systems & RV Accessories
Besides, the brakes do help and are usually a good idea. The problem I have with most brake-buddy-type actuators is that they work as "surge" brakes, i.e. not connected to the motorhome in any way, and will tend to activate (incorrectly) on bumps, downhills, etc. If you can find a brake system that actually connects to the motorhome's trailer brake controller, that would be much better, but I don't know of any right offhand. Lacking that, find a full proportional unit like the Roadmaster Even Brake.
In any case, don't go too high on the braking power adjustment or you will have a nicely warped set of rotors after each trip.
Now as to towbars. The finest ones I have ever used are the ones made by Roadmaster. Specifically, you want the "All Terrain" ones that have ball-type pivots and quick release auto-locking latches. These make hookup an absolute breeze, since you don't have to be either level or exactly lined up. You can get these in both car-mount or motorhome-mount styles. I use the latter. For either one, you need the matching base plate that fits the car, plus stuff like safety cables, which you can get in a handy kit.
(I know it must sound like I'm some kind of shill for Roadmaster, but I'm not. I just like and use their stuff. I'm not affiliated with them in any way.)
BTW this is good stuff and as such, it ain't cheap. By the time you get the tow bar, base plate, accessories, and braking controller, you may not have too much change left from $2000.
Oh yeah, one more thing. You should do what it takes so that when you are all hooked up, the tow bar is within 5 degrees of level. "What it takes" means using raise or drop hitches on the motorhome as needed. Do not tow with a tipped-down tow bar! Oh, and don't ever back up (more than a couple of feet) with the car attached.
Oh yeah #2 - you have to have some kind of working lights on the rear of the car while towing, meaning brake, turn, and running lights. You can use magnet-mount universal ones (easy to use and cheap), or go to the trouble of modifying the car's wiring to use the car's own lights (expensive, difficult, but cleaner and less prone to theft).
Hope this helps. Having a "toad" (nickname for towed vehicle) really enhances RVing.